CytomX Therapeutics Added to NASDAQ Biotechnology Index

SOUTH SAN FRANCISCO, Calif., Dec. 18, 2017 -- CytomX Therapeutics, Inc. (Nasdaq:CTMX), a clinical-stage biopharmaceutical company developing investigational Probody™ therapeutics for the treatment of cancer, today announced that the company has been added to the NASDAQ Biotechnology Index (NASDAQ:NBI) effective December 18^th, 2017. The index tracks the performance of a set of securities listed on The NASDAQ Stock Market that are classified as either biotechnology or pharmaceutical according to the Industry Classification Benchmark and that also meet other eligibility criteria. The NASDAQ Biotechnology Index is calculated under a modified capitalization-weighted methodology.

About CytomX Therapeutics
CytomX Therapeutics is a clinical-stage biopharmaceutical company with a deep and differentiated oncology pipeline of investigational Probody™ therapeutics. Probody therapeutics are designed to exploit unique conditions of the tumor microenvironment to more effectively localize antibody binding and activity while limiting activity in healthy tissues. The Company’s pipeline includes cancer immunotherapies against clinically-validated targets, such as PD-L1 and CTLA-4, and first-in-class Probody drug conjugates against highly attractive targets, such as CD166 and CD71, which are considered to be inaccessible to conventional antibody drug conjugates due to their presence on healthy tissue. In addition to its wholly owned programs, CytomX has strategic collaborations with AbbVie, Amgen, Bristol-Myers Squibb Company, Pfizer Inc., MD Anderson Cancer Center and ImmunoGen, Inc.  For more information, visit www.cytomx.com or follow us on Twitter.

CytomX Therapeutics
Media:
Spectrum 
Christine Quern
[email protected] 
202-587-2588

Investors:
Trout Group
Pete Rahmer
[email protected] 
646-378-2973